Blackboard-eraser



{No Model.)

0.1512015211. BLGKBOARD ERASER.

No. 559,765. Patented May 5, 1896.

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Wil/MRS S @Si l E RAHAMvPHOTO'LTHWASNING NBC UNITED STATES CHARLES J.BECKER, OF PITTSBURG, PENNSYLVANIA.

BLACKBOARD-ERASER.

SPECIFICATION forming part of Letters Patent No. 559,765, dated May 5,1896.

Application led March 16, 1895.

To all whom it may concern:

Be it known that I, CHARLES J. BECKER, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inBlackboard- Erasers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to malte and nse'thesame, reference being had to the accompanying drawings, which form apart of this specification.

My invention relates to an improved blackboard-eraser; and it consistsin certain details ot' construction and combi nation of parts, as willbe fully set forth hereinafter.

In the accompanying drawings, Figure l is a perspective sectional viewof my improved blackboard-eraser, which is constructed and arranged inaccordance with my invention. Fig. 2 is an inverted plan view of therubber or eraser, showing portions of the same broken away in order toshow the construction of the same.

To put my invention into practice, I provide a block of Wood or othersuitable material l 01E a suitable size and form of construction, andform in the under side two grooves Serial No. 542,008. (No model.)

2 for the reception of the chalk-dust, and also form an opening 3 at oneend for the removal of the same, and iit the said opening with a plug orstopper 4. Arranged over these dustchambers 2 is a perforated metallicplate 5, having a number of minuteopenings 7, and cover the said platewith a sott felt eraser G. This eraser or covering 6 is formed from aporous or loosely-Woven felt-cloth, which will permit the dustto passthrough the same into the chambers 2, from4 which it may be removed atintervals by withdrawing the plug 4.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is-

A blackboard-eraser, consisting of the block l of a suitable size,provided with dust-chambers 2 and discharge-opening 3, a perforatedplate 5 arranged over the said dust-chambers, and a felt covering placedover the said plate to form the eraser, all combined and arranged as andfor the purpose described.

In testimony that I claim the foregoing I hereunto affix my signaturethis 27th day of November, A. D. 1894.

CHAR-LES J. BECKER.

In presence of# Jas. J MoArnn, M. E. I-Innnrson.

